Can anyone answer this question? I was looking at the stream info when watching HD channels from an antenna, and I noticed some channels were showing 29.97 fps, and others were showing 59.97 fps. Also, the only channels that seemed to be affected by changing deinterlace settings were the ones that were 29.97 fps. The channels with the higher framerate looked the same even with no deinterlacing whatsoever. My question is, are some channels just broadcast in progressive scan mode or something?